Apparatus for printing an original on to a copying paper



Aug. 20, 1963 I I w. SALGER 3,101,034

APPARATUS FOR PRINTING AN ORIGINAL on TO A COPYING PAPER Filed Sept. 1, 1960 2 Sheets-Sheet 1 3 1 F/G mi 28 g6 a T."

W. SALGER Aug. 20, 1963 APPARATUS FOR PRINTING AN ORIGINAL ON TO A COPYING PAPER Filed Sept. 1 1960 2 Sheets-Sheet 2 Known printing devices have a transparent exposure plate' which may be flat or curved. Pressure application ing because these plates require-special fixing meansl'or 7. accessible thu makin QIaH Q H v i Y ""Thereis "a, further disadvan of platesibewming age] by scratching or thelike;

knownfpriri-ting dleyicesjbyfthe',feature that the printing? plate-is provided with aperturjes which are so arranged in: t CO Ct H Widtliand length of the slot is such relathe'copyingapaper-th t every,,p oint of the paper isirsub- A or the apertures on the surface. :By thisjmeans perfectly i clear regions are always availabl for elfec't-ing the ei'r-i ,,,posure. i v I now possible for the printing plate ltobe produced in V tics mate ri vantage of easier processing infthat-no specialholding means have to be fitted on theplateitself. Jltislpossible,

mam

U i d-11 m p I r 3,101,0341; Y r

PARATUS FOR-PRINTING AN QRIGINAL thewebs remaining .ther'ebetween. i r t W E Q PYXEIG PAPER t In accordance with another preferred featurewiththe ig i gf fi Egg" am? 6:22:3 t width: of slot in relation-touhe length of slot and inclinafi Sept 1, 1960, Sen y v tion of the slotsrelative'to the direction of feedis such Claims'priority,application Germany Sept. 23, 1959 e, h the of l ag nary parallels to the 3 Claims. (Cl. 95-77.5) W direction of feed of 'the'sections dlsposed 1n the slots'1s s V M x t equallylong. I With the arrangement of the apertures, more especially the slot-shaped apertures, inthe printin'giplate there is a The present invention concerns an apparatus, for printing an original on to a copying paper, including an ex posure light source, a feeding devicefor the original and possibly that the corners or edges of the paper "passing the copying paper and a printing plate disposed b t een through are caused to be curled up within the apertures. the feeding device and the light source. 7 I a This is obviated in a particularlypreferred embodiment Various methods are used for producing copies with 15 by means of edges extending at least on one side of the such printing devices. In the-diffusion method, for ex ample, a negative emulsion support together with the original is passed through the exposure device; When using a heat developing method a copying paper is passed through on which later the image is developed;

the original and the copying paper outwardly in the direction of feed. These edges may be rectilinear and/or curved. i

The apertures are preferably so arranged and/tor staggered relative to one another that the parallels, ex-

tending through these apertures and spaced atle-ast -3 mm.

from the'cen tre'line relative to the direction of feed, interbands or a roller are known as feeding devices.

' ;sect at least one of thiese aperture edges extending Transparent printing plates are comparatively eXPCn-W sive not only due to the material used which must'have' qu y n an outward direction on theaside of: the.

aun'iform permeability to ilight'bu-t also dueto the process-' apertures" facing the centre line. In one particular em-' "to the directionof feed.

frames. 1 l I p "In a-nf embodiment havingislot-shaped apertures the The'se known plates becomesoiled in course propels,

tion,'sfor 2eXample,-in that dust collects on'the surface of slots'eitend' in the' n 'Of S Q Y in an out:

ward direction from the centre, linejfof thejconveying,

the plates Theseplatesin known devices are no-treadily V I A p path. ,jln 'this'case a substantially-triangular aperture, is conveniently provided which is flared'inthedirectioin of soiled ontheuirdeisid because eitherthe coyping papers ,QqueIy .,outwards from the, centreiline inlth'e direction of 5 feed, which .ape'rtu'res areprovided" with" front and "tear ,Tlie ,present. -invention" removes theedisadvantages relatiorii td lthe "direction of feed of the original'and of-'1 ti'v'e' toaits inclination that each parallel -to1 the direction jected for anaequalperiod and to a'n equal extent to -the influence ofthe ligh t'sourcef T ablyreotilinear with parallelisides. r

' :iSuclijapertures, when the printing late is madefrorn y' n u o l a sl 'eb i "t m ii i transparentmaterial,involve substantial advantages; be

cause a self-cleaning action tallges place {on theundersid tilt is impossible for any ldust to collect in -theqre'g ifflOiie partic'uIarAadvantage lisi" due tojtherfa'c t that i is.

opaque mi terials ,:p'referably metahjfor example in plasl llfiici nt spa g fibmrl t ,SOIiiCe; I I Q 1 3 .tg-Besider'the substantial reductionof manuaspect in a special form of construction, when-using slots least one end of the slots are bent ofi in a.d irection parallel relative to the direc-tion offeed, I for example for a sheet metal plate to be extended beyond thefe'x'posure device and to use it simultaneously asa guid the apertures. In oneparticular embodiment, for exingelement in theadjacent parts of the device. ample, round or'substantially rectangular. apertures are When a cylindrical feeding mechanism is used the plate may be readilyand accuratelya'dapted to the curvature of this caseit'is' also P to f l h iti n that the roller. r p t all sections of the paper pass beneath the apertures for ln'accordan'cefwith one preferred feature the apertures the same time period.

Patented Aug. 20,. 1963 :areslot-shaped andarranged obliquely to the direction of i feed of the paper, The slots are conveniently widerjtharr aperture from the centre line ofthe conveying track for feed, this aperture, forexamplehaving rhowevenaaflate ,orfeeding:devices rub.dust over theaunderside. In this 35 tene'd tip. One preferred form: of rconstructionf'nclude 1 caseeiisebfcertain materials could'also result in'darnwebs karrangedgbetween'the apertures: which extendj obli;

edges dispose'd'at right angles to thedirection ofifeed; In

' offeed intersects a webforin thecentre. line a web portion between the aperturesul In this. case the webs are prefer and; r re ampngva printing plate, is; provided that the distance between he-lig t ime I' disposed obliquely relative to the direction 'offeedfat" The invention is not limitedto a slot-shaped-designT of? arranged in several rows iotfset 'relative to one another. i

against edges of apertures.

the smallest possible space the apertures 47 to 52 and 61 are provided at their sides situated at the trout and rear in the direction of feed with edges disposed at right angles to the direction of feed.

The 'width of slot is such that the webs fonrned between theslots at least partly overlap one another so that apart from, a central regi on corresponding to the distance 62, allportions of thepaper passing through the device and which reachthe region of an aperture situated at an edge extending at rightangles to the direction of feed,. pass beneathat least one of the web edgess-ituated outward of the centre line, which edge as stated above "extends in the direction of feed of the paper outward of the centre line. To explain this feature reference is made to the parallel 63ushown in'the drawing relative By this means it is ensured that corners which may 1 possibly curl upwards in' the aperture, are-smoothed by the roller, said printing plate being provided with apertures formed 'in said curved section which, in relation to the direction of feed'of the original and the printing paper are so arranged that each pointof the papers is to the: centre line. -'Ilhis fparallel is laid by means of 1 subjected to the influence of the light source over an equally long period and/or to an equal extent, .a driving means driving the feeding mechanism roller and connecting means to connect at least one light source.

2. An apparatus for copying an original on to copying paper comprising, in combination, a housing, an original oblique [outwardly directed leading edge of the webs and" urged against the roller ,3 or 38 without there being a risk of such corners being damaged, for example, by

It is to be pointedout that for this purpose, for example, the direction of feedof the front edges of the apertures can also be caused to extend obliquely forwards and outwards; In this case it will also be necessary to effect corresponding alterations to the edges of the aperture disposed to the near in the direction of feed to produce a uniform exposure.

The sections on the parallels 63, 67, 68 which are situ-' ated in the region of a web are designated a. It is evident that these distances a: are equal for-all parallels to the centre line; Even in the region of the centre line'45 a distance a between the slots 47, (50 intthe region of the slot arrangementis covered by a Web element which corresponds to the cut oiflpoint of the substantially triangular aperture 61. g

The arrangement is such that each parallel 62, 63,- 67,

V intersects a Web only once. The invention also concenns otherconstructions wherein several 'webs are interseeded by the'parallels, the sum of the sections disposed beneath different v'vehsbf individual parallels being equal.

It is evident that the distances designated b on the parallels extending in the region of apertures areeach 'e'qual.:

Additionallyit is pointedout that the pres ent, iii/51'1- tion is'not limited to theuse of a curved printingplate;'

- it is possible, for example, by simultaneously arranging.

other feeding devices, to use a flat printing plate 2. o r 1 Sheet metal has been mentioned above as a preferred material because it is a good heat conductor, thu'sjobtainand copy paper transport means within said housing for ings defined insaid housing aligned with saidtrans-port means for receiving and discharging said original and copying papers, an exposure light source said housing, said transport means including a light impervious printing plate interposed between said light source and the papers passing through said transport means, apertures defined in said plate permit-ting light to pass therethrough, said apertures including first and second sets of evenly spaced, parallel slots obliquely arranged to the direction of movement of said papers andhaving front portions, the angle of the slots of a set and the spacing between the slots being such that all portions of papers transported past. said slots will be equally exposed to said light, said first and second sets being angularly related in opposite directions with respect to the central regions of the path of movement of said papers and transversely disposed thereto at a common location in said path, .a composite aperture defined in said plate centrally intermediate said first and second aperture sets for exposing the central region of thepapers transported past said sl-otsets, said composite aperture including opposed sides, each of said sides being adjacent and parallel to the slots'of one of said sets, the maximum dimension of said' oomposite aperture in rthe direction parallel to the papersxpath of movement being substantially equal to the exposure dimensiondefined by said slots in the direction parallel to the papers' path of movement the of movement.

ing at the same time 'anlimproved dissipation of heat the printing device; The invention concerns an transparentfiand, with particular advantage, opaquematerials.

fit is pointed out that the invention not limited to thedescri-bed details and embodiments; Itis obvious to experts thatmodi-fications and arrangements of details g are possiblej-iand these modifications and arrangements g of detail reside the nature'and in thescope' of this inventionto the extent at which they are characterised :in

the" appended claims.

Whartis claimed is: t s f 1. An apparatus for printing an originalron to copying paper comprising a housing, a printing device arranged in the housing, inlet rneansin a housing wall for feeding the-original to the printing device, outlet means in a housing wall for discharging the original and the copying paper from the printing device, the latter being provided with an exposure light source which is arranged in the housing, a feeding mechanism comprising a roller arranged at a clearance in front of-the light source be-.

3. An apparatus for copying an original onto copying, paper comprising, invcombina-tion, a housing, an original and copy paper transportmeans within said housing for conveying said papers therethrough, inlet and outlet open ings defined in said housing aligned with said tnausport means for receiving and discharging said original and copying papers, an exposure light source within saidhousng; Suid'tnansport means including a' light impervious printing plate interposed between said light source and the papers passing through said transportmeans', apertures defined in said plate permitting light to pass therethrough, said apertures including first and second sets of evenly spaced, parallel slots obliquely arranged to the direction of movement of said papers, the angle of the slots of a set and the spacing between the slots being such .that all portions of papers transported past said slots will be equally exposed to said light, said first and second sets tween the inlet and outlet means and adapted to convey being angularly related in opposite directions with respect to the central regions of the path of movement of said papers and transversely disposed thereto at a common location in said path, a composite aperture defined in said 7 said slot sets, the front portions of thes'lots of each set of the pape-fls path of movement than the slot portions 5 v 3,101,034 7 r v v p e I plateintermediate said first and second aperture sets for "gaging said roller, said slots .being defined in said plate exposing the central region of the papers transported past cylindrical portion. t i v 1 References Citedin the fileof this patent UNITED STATES PATENTS first exposing saidpapers being nearer the central region iooated behind said ,fnontportions with respect $0 the 1,106,504 Allg- 1914 "pape'rs direction of movement, said transport means in- 1246974 q ---'---t 2011917 2,510,863 Buskes June 6,-1950 eluding a cylindrical roller rotatably and fdrivingly .mountedwithin said housing, said printing plate having 10 i I FOREIGN PATENTS a 1 .a" cylindrical portion complementarily shaped to and en- Great Britain 2 i 

1. AN APPARATUS FOR PRINTING AN ORIGINAL ON TO COPYING PAPER COMPRISING A HOUSING, A PRINTING DEVICE ARRANGED IN THE HOUSING, INLET MEANS IN A HOUSING WALL FOR FEEDING THE ORIGINAL TO THE PRINTING DEVICE, OUTLET MEANS IN A HOUSING WALL FOR DISCHARGING THE ORIGINAL AND THE COPYING PAPER FROM THE PRINTING DEVICE, THE LATTER BEING PROVIDED WITH AN EXPOSURE LIGHT SOURCE WHICH IS ARRANGED IN THE HOUSING, A FEEDING MECHANISM COMPRISING A ROLLER ARRANGED AT A CLEARANCE IN FRONT OF THE LIGHT SOURCE BETWEEN THE INLET AND OUTLET MEANS AND ADAPTED TO CONVEY THE ORIGINAL AND THE COPYING PAPER FROM THE INLET MEANS TO THE OUTLET MEANS, A PRINTING PLATE ARRANGED BETWEEN THE LIGHT SOURCE AND THE FEEDING MECHANISM IN THE HOUSING HAVING A CURVED SECTION COMPLEMENTARILY CONFORMING TO AND ADJACENT TO SAID ROLLER AND IN WHICH THE FEEDING MECHANISM IS GUIDED IN ORDER TO LEAD THE ORIGINAL AND THE COPYING PAPER PAST THE PRINTING PLATE, ONE END OF SAID PLATE BEING PIVOTALLY MOUNTED TO SAID HOUSING AND MEANS BIASING THE OTHER END OF THE PLATE TO URGE THE PLATE AGAINST THE ROLLER, SAID PRINTING PLATE BEING PROVIDED WITH APERTURES FORMED IN SAID CURVED SECTION WHICH, IN RELATION TO THE DIRECTION OF FEED OF THE ORIGINAL AND THE PRINTING PAPER ARE SO ARRANGED THAT EACH POINT OF THE PAPERS IS SUBJECTED TO THE INFLUENCE OF THE LIGHT SOURCE OVER AN EQUALLY LONG PERIOD AND/OR TO AN EQUAL EXTENT, A DRIVING MEANS DRIVING THE FEEDING MECHANISM ROLLER AND CONNECTING MEANS TO CONNECT AT LEAST ONE LIGHT SOURCE. 